1气门座圈更换的现状从现有的资料看,目前国内在检修更换内燃机车柴油机气缸盖进、排气门座圈时,操作比较繁琐,劳动强度较大,效率较低。通常采用的方法是:①机加工,即利用镗床将气门座圈的厚度镗修到较薄的尺寸;②用器具将镗修后的座圈破坏,再利用杠杆原理,将留在座孔内的气门 1 valve seat replacement status From the available information, the current domestic diesel engine cylinder head replacement, exhaust valve seat, the operation is more complicated, labor-intensive, less efficient. The commonly used method is: ① Machining, that is, the use of boring machine to the thickness of the valve seat boring repair to a thinner size; ② with the appliance after boring seat destroyed, and then use the lever principle, will remain in the seat hole Valve